Safety envelope



7 9 F. BOGASKIE 1,722,451

SAFETY ENVELOPE Filed Jan. 51, 1927 3 Sheets-Sheet 1 July 30 1929. I B QGAsKlE 1,722,451

sAi-Eii ENVELOPE v Filed Jan. 31. 1927 s Sheets-Sheei 2 INVENTOR July 30, 1 929. FKBOGASKIE v SAFETY ENVELOPE Filed Jan. 31. 1927 s sneets-sneet 5 f'la. 7

' 4INVEINITOR Patented July 39, 1929.

UETE.

FRANK BOGASKIE, OF JOHNSTOWN, NEW YORK.

SAFETY ENVELOPE.

Application filed January 31, 1927. Serial No. 164,804.

The general object of my invention is to provide a device of this character which may be sealed in such a way that it is practically impossible to remove the contents thereof without destroying the wrapper. More specifically the object of my invention is to provide an envelope in which the overfolded portions, in addition to being adhesively secured together, are fastened by means of rivets or the like which are clinched or upset on the inside or inaccessible portion of the envelope. My invention contemplates an envelope which, generally speaking, may be sealed in the usual manner by means of an adhesive, but which will be provided, after having been so sealed, with a small opening through which a riveting or stapling machine may be inserted whereby the last overfolded portions may be riveted or stapled together and the rivets or staples clinched or upset within the envelope, thus rendering them inaccessible for removal by unclinching. In its preferred form, my invention contemplates an envelope having a main compartment one side of which is of double thickness, and in which the small opening above mentioned, remaining after the main compartment is sealed will not permit of access to the contents of the envelope.

lVith these objects in View my invention includes the novel features of construction and the novel combinations and arrangements of the elements described below and illustrated in the accompanying drawings in which Fig. 1 is a view of the blank from which my envelope is formed; 1

Fig. 2 shows the blank with the first overfolded portions;

Fig. 3 illustrates the second overfold;

Fig. 4 is a view of the reverse side of Fig. 3 showing how the end flaps are overfolded and secured by rivets;

Fig. 5 is a view of Fig. 3 after the end flaps are overfolded and fastened. This figure is, of course, the reverse side of Fig. 4 and serves to illustrate that the rivets do not pass entirely through the envelope but are upset or clinched on the inside. Figs. 4 and 5 illustrate the appearance of the tinished envelope as offered to the trade;

Fig. 6 illustrates the first sealing operation showing how the sealing flap may be riveted by a suitable instrument inserted from the small opening still remaining at the end;

Fig. 7 illustrates how the envelope is finally closed I by overfolding and sealing the small end flap; and

F ig. 8 is an enlarged section of Fig. 6 in the plane 88.

Referring to the drawings, the dotted lines, 1, 2, 3 and 7, indicate lines along which the blank is folded to form a rectangular envelope. The dotted lines, 4, 5 and 6 also represent lines of fold. The shaded poi tions, 8, represent adhesive.

The rectangular portion, 9,'dcfined by the dotted lines 1, 2, 3 and 7 is the front of the envelope. The back of the envelope is preferably of double thickness, the inner portion of which is formed by the side flaps, 10 and 11, and the outer portion by the rectangular part, 12, which is substantially the same size as the front .of the envelope, 9.

In forming the envelope, the flap, 10, is

first overfolded along the dotted line, 1. The flap, 11, is then folded along the dotted line, 2, and sealed over the flap, 10. The portion, 12, is then overfolded and sealed on the flaps, 10 and 11, as shown in Fig. 3. It will be here noted that the center portion of the rectangular part, 12, is not sealed to the flaps, 10 and 11, but may be separated therefrom to admit a riveting instrument between the sheets forming the double back of the envelope, for the purpose hereinafter described. The end flap, 13, is then folded about the edge of the envelope along the dotted line, 4, and the portions, 14 and 15, of the end flap on the opposite edge of the envelope are folded over the edge about the line, 5, as shown in Fig. 4. The portions, 13, 14 and 15, may then be riveted through the front portion .of the envelope, 9, and the rivets, 16, clinched or upset on the inside of the envelope. The portion, 17, between the portions, 14 and 15, is not sealed to the front of the envelope but is provided with adhesive material, 4, sothat it may be sealed against the front of the envelope after the contents has been placed therein and after the nain, flap has been sealed, and riveted.

The envelope is provided along one edge with the large sealing flap, 18, adapted to effect a closure of the envelope. The papers to be enclosed in the envelope are inserted at the edge adjacent the flap, 18, which is y then folded over the opening and sealed upon the back of the envelope by means of the adhesive, 8. It will be apparent that there is a comparatively small slit or opening in the edge of the envelope and adjacent the flap, 17, and between the portions, 10 and 12.

Through this slit a long shank riveting in-' struinent may be inserted and by means of which rivets, 19, and 21, are inserted through the large sealing flap, 18, and the back, 12, and clinched on the inside of the envelope between the portion, 12, and the portions, 10 and 11. It is important to observethat the slit in the edge of the envelope adjacent the flap, 17, does not permit of access to the interior of the envelope where the papers are enclosed, but simply permits the riveting instrument to be in serted between the portions forming the double back of the envelope. The contents of the envelope are covered by the flaps, 10 and 11, and the slit merely permits the insertion .of the riveting instrument into the space between the flaps, 10 and 11, on one side and the portion, 12, on the other. The slit adjacent the flap, 17, is made as small as possible so that it is quite impossible to effect an unclinching of the rivets, 19, 20 or 21, through this opening.

In my preferred form of envelope, small gummed flaps or tabs, 22, are provided which may be folded over along the line, 8, and sealed against the flaps, 10 and 11, on the inside. These gummed tabs contribute greatly to the strength of the envelope but are, of course, not essential. lVhere desired a flap, 23, may be provided along the edge of the back ofthe envelope which is adjacent the main sealing flap, 18. Where such a flap is provided it is folded over the line, 8, about the papers contained in the envelope and serves to strengthen the envelope along this edge.

Where there is no objection to the small slit adjacent the flap, 17, providing direct access to the compartment of the envelope designed to contain the papers, the flaps, 10 and 11, may obviously be omitted, in which case, no adhesive is provided on the interior of the back of the envelope. Such an envelope may be sealed exactly as described above and will have substantially all of the advantages of mypreferred form of envelope except that the unsealing of the flap, 17 will permit a limited access of the contents of the envelope.

It may also be noted that the flap, 17, itself, is not absolutely essential, it being merely essential that a small opening is left for the insertion of the riveting instrument. This is particularly true where the flaps, 10. and 11, are used which prevent direct access to the main compartment. However, it is preferable to use the flap, 17, to effect a complete closure of the en velope.

While I have described my invention in its preferred form, it is to be understood that the words which I have used are words of descriptioirrather than words of limitation, and that changes within the purview of the appended claims may be made without adapted to close one edge of said envelope,

and a second, comparatively small, sealing flap on a side adjacent said first mentioned flap adapted to close a small opening provided in the edge of said envelope for the insertion of an instrument for riveting said first mentioned flap on the inside after it is sealed.

3. A safety envelope comprising overfolded portions forming two, separate compartn'ients and secured in overfolded position by r *ets clinched between said portions; one of said compartments being the main compartment and provided with a sealing flap adapted to effect a closure thereof; and the other compartment being substantially closed but provided with a small opening affording limited access thereto adapted to permit the insertion of a rive ing instrument to effect an interior clinching of rivets passed through the sealing flap of the main compartment.

4. A safety envelope comprising a front portion and infolded lateral portions forming the main compartment of said envelope, a portion overfolded said lateral portions and forming therewith a side of said compartment of double thickness, lateral flaps on said overfolded portion folded about the edges of said envelope and secured to the .frontthereof by rivets clinched upon the inside of the compartment, and a main flap adapted to be overfolded the side of double thickness to effect a complete closure of the compartment; a small portion of one of said lateral flaps being unsecured to the front of said envelope to provide limited access to the space between the portions f ming the side of double thickness.

5. A safety envelope blank comprising a portion adapted to form the front of said envelope and provided along one edge there of with a main sealing flap adapted to be folded along said edge to effect a closure of the envelope, portions adapted to'be successively overfolded upon. said front portion to form a back for said envelope of double thickness throughout, and the last of said successively overfolded portions being provided With lateral flaps adapted to be "folded about the opposite lateral edges of said envelope and secured againstthe front thereof; a small portion of one of said lateral flaps being foldable independently of the major portion and adapted to be left un secured to provide limited access to the space between portions forming the double back of said envelope.

6. A safety envelope having, a sealing flap and main compartment provided With a side of double thickness and comprising a portion overfolded upon the portions forming one side of the main compartment and se cured to the portion forming the opposite .side of said compartment by rivets clinched Within the main compartment; the portions forming the side of double thickness being slightly separable after said envelope is sealed to permit the insertion of a riveting instrument therebetween.

7. A safety envelope provided with a main sealing flap and means forming two separate compartments comprising overfolded portions secured together by rivets clinched at points inaccessible after the main flap is sealed; one of said compartments being substantially inaccessible after the sealing of the main flap but adapted to permit the lnsertion of an lnstruinent for rivet 111g sa d flap 1n sealed position.

FRANK BOGASKIE. 

